137 
This genus is nearest to the monotypic Piptocalyz, so far only known 
from N.H. Australia, in the reduced number and arrangement of the perianth- 
segments and the shape of the stigma; but it approaches Trimenia in the 
hermaphrodite flowers, differing from both in the terminal inflorescence, 
larger flowers, thick stamens with very short strap-shaped filaments, and 
bilocular ovary. In habit both species agree with 7rimenia, but the leaves. 
in J. novo-guineensis differ in being small and coriaceous, alternately to 
sub-verticillately arranged, while J. arfakensis, on the contrary, approaches 
Piptocalyex in the large opposite leaves, pseudo-herbaceous in texture, 
produced at the apex in a long caudate appendage. 
Fie. 10, 
Idenburgia novo-guineensis Gibbs.--A. Branch; B. Flower with tepals ; C. Inner 
tepal; D. Flower, tepals shed; E. Ovary; F, Showing pressure of stamens 
at base of ovary ; G. Transverse section of ovary; H. Stamen. 
IDENBURGIA NOVO-GUINEENSIS Gibbs, sp. nov. 
Arbor parva, glaberrima, rami erecti, teretes, cortice cinerascente, striguloso 
obducti, innovationes rufescentes. Folia parva, alterna vel subverticillata, petiolata, 
oblanceolata, obtusa vel subacuta, basi in petiolum attenuata, glanduloso-serrata, 
recurvata, coriacea, supra minute punctata. Tepaia 4, biseriata, albida, rotundata, 
obtusa, margine subcrenulata. Stamina 8-9. Ovarium late ovoideum, aliquanto 
compressum, glabrum. ~ 
Hab. Arfak Mts., Koebré Mt., edge of shrubberies on summit, 9000’. 
Fl. Dee. 5654. 
